I have followed all tutorials on the web to do this. Everything works fine, up to the point I add this line on a class:
#import
Make sure you have set the paths:
In the Header Search Path I use ${SRCROOT}/macOS and set it to Recursive. Why not specify the directory and non Recursive? I searched for bugs related to XCode 11 and Header Search Path. If I set the full path it did not work. If I set it to ${SRCROOT} and recursive it failed. Odd?
The same Library Search Path - the path to the .a files - you could just say ${SRCROOT} but this can get you in trouble if you have multuple .a files for different architectures in the same project. This threw up linking errors for me so I used ${SRCROOT}/macOS.
The easiest solution would be to use CocoaPods - there is an OpenSSL pod...